Merge "Add a content overlay for auto-enter w/o a source hint rect" into sc-dev am: 8b74cbbf96 am: 854122d6d4

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14102623

Change-Id: I5dd711bb03bcfc6bb936debf513836e3021da836